TM 1-1520-265-232.27.3.7 Marking and Recording of Inspection Results. Mark and record inspection results as required by paragraph 1.3.2.27.3.8 Demagnetization. With the switch remaining in the AC position, place the probe/yoke legs in the same positionused for magnetizing. Press the test switch and withdraw the probe/yoke from the part for a distance of two feet beforereleasing the switch.2.27.4 BackupMethod. None required.2.27.5 SystemSecuring. Clean the pitch beam washer thoroughly to remove all residual magnetic particle media. Referto Post Cleaning and Restoration of Part or Area After NDI, paragraph 1.4.16. The pitch beam washer requiresinstallation in accordance with the applicable technical manuals listed in Table 1-1.2.28 PITCH BEAM RETAINING NUT (MT).2.28.1 Description(Figure2-1.IndexNo.28). The pitch beam retaining nut retains the pitch beam to the tail rotorgearbox shaft.2.28.2 Defects. This inspection is used to verify crack indications found visually on the pitch beam retaining nut. Nocracks are allowed.2.28.3 PrimaryMethod. Magnetic Particle.2.28.3.1 NDI Equipment and Materials. (Refer to Appendix B.)a.Magnetic Particle Inspection Probe/Yokeb.Magnetometerc.Black Lightd.Fluorescent Magnetic Particles, refer to Table 1-8e.Consumable Materials, refer to Table 1-8f.Aircraft Marking Pencil, refer to Table 1-82.28.3.2 Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance. A partial inspectionfor cause (visual indications, sites of mechanical damage, corrosion, etc.) may be performed on all exposed surfaces ofthe installed part using applicable positions of this procedure. If required, the pitch beam retaining nut shall be removedin accordance with the applicable technical manuals listed in Table 1-1.2-67
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